Research On Intelligent Control System Of Rotary Steerable Drilling Tool Eccentric Ring

With the rapid development of science and technology,people’s requirements for material are gradually increasing and resource consumption is gradually accelerated,which promotes people’s demand for energy and awareness of oil exploitation.Currently,oil and gas resources are becoming more and more difficult to exploit by using traditional oil exploitation equipment.Intelligent drilling equipment can adapt to the exploitation of complex oil and gas resources,so the intelligent drilling technology have attracted more and more attention by the oil drilling industry.At present,a variety of rotary steerable drilling tools are steadily increasing their market share,but most of them still have problems in use,for example,they have open-loop phenomenon in terms of intelligent control and intelligent steering,and the control direction of the drilling tool output is fixed.Intelligent rotary steerable drilling tools can be more flexible and intelligent to control the steering of drilling tools and complete the development of complex well trajectories and locations,having a wider range of applications.In this paper,the intelligent control system of rotary steering is designed and researched.The research contents are as follows:.(1)Designing an overall structure for eccentric ring and control system of rotary steerable drilling tool.GD32 is used as the intelligent control processor of eccentric ring,and the hardware circuit and related intelligent control algorithm of the control system are designed with the GD32 processor as the center,including the design of eccentric ring driving circuit and the design of eccentric ring position detection circuit.The driving circuit design such as the inner eccentric ring drive circuit design,the outer eccentric ring drive circuit design.The detection circuit design includes inner eccentric ring position detection circuit,outer eccentric ring position detection circuit,tool attitude detection circuit,inner eccentric ring drive current detection circuit,outer eccentric ring drive current detection circuit and inner and outer eccentric ring rotation speed detection circuit.(2)Designing software of eccentric ring intelligent control system.In the aspect of software design,the idea of modular design and hierarchical design is used.Several important modules are introduced,including the initialization of the system,the main interrupt service program of the system and the task creation program.The communication protocol uses the control method based on parity check code and custom rule check.(3)Researching the eccentric ring and intelligent control of the rotary steering drilling tool.The eccentric ring control system model based on adaptive fuzzy PID algorithm and traditional PID control algorithm is created in MATLAB,and the two are simulated.By studying and comparing the simulation curve,the advantages of adaptive fuzzy PID algorithm are obtained.In the control of eccentric ring rotation more intelligent and higher control precision.(4)Developing the prototype of eccentric ring for rotary steering drilling tool.According to the hardware design and mechanical structure,the prototype was made to further verify the accuracy,stability and intelligent control effect of the control algorithm through the prototype,and the offline debugging results were analyzed.